| 摘要 |
PURPOSE:To make it possible to absorb vibration over a wide frequency range by setting the flow resistance of a first communication passage to a value which is equal to or less than that of a second communication passage, and by setting the liquid pressure resistance of an expanding and retracting means in a first auxiliary liquid chamber to a value which is equal to or less than that in a second auxiliary liquid chamber. CONSTITUTION:A pressure receiving area is communicated with a first auxiliary liquid chamber 42 and a second auxiliary liquid chamber 48 through first and second communication passages 36, 46, respectively. Liquid chamber expanding and contracting means 44, 52 are disposed in the first and second auxiliary liquid chambers 42, 48. The liquid flow resistance of the first communication passage 36 is set to a value which is equal to or less than that of the second communication passage 46. The liquid pressure resistance of the expanding and contracting means 44 in the first auxiliary liquid chamber 42 is set to a value which is equal to or less than that in the second auxiliary liquid cham ber 48. Thereby it is possible to absorb vibration over a wide frequency range. |
